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Starfish
Also known as sea stars, these echinoderms are 2,000 species strong and found in seas and oceans all over the world. They can vary in size from less than half an inch to more than four feet across.
1,388 Questions
What is sticky on a starfish and sea urchins?
They release a gluey substance from their mouths, almost like saliva.
What is the family of a starfish?
It depends what kind of starfish you are talking about there are many diffrent species.
But the common star fish (Asterias rubens) Is as follows.
Kingdom - Animalia
Phylum - Echinodermata
Class - Asteroidea
Order - Forcipulatida
Genus - Asterias
Species - rubens
How is polution affecting starfish?
Pollution effects all sea life in one way or other. For starfish, marine biologists have learned that their breathing pores often become clogged.
Classification for a starfish?
Starfish have got absolutely nothing to do with fish. Their name originates from antiquity, when everything living in water was called a fish, whatever it looked like. In those days, little was known about classes of life, and that is why many totally unrelated creatures are called fish, such as jellyfish (cnidarians) starfish, and even headless chicken fish, a popular name given to a deep water sea cucumber (coincidentally one of the sea star's closest relatives).
Starfish are now officially known as sea stars.
They are echinoderms. Echinoderms are a totally unrelated to fish. They are a huge group. Their members include sea stars, sea cucumbers, brittlestars, sea urchins and crinoids. The group is actually a phylum of its own, on the same rank as chordata, which are basically vertebrates and a few other creatures. In other words, the echinoderm group is the same rank as the group containing all mammals, reptiles, amphibians, birds, fish and many others.
Echinoderms are the only group of animals which have radial symetry, in other words, more than a single symmetry. Common sea stars have fivefold symmetry, meaning five different divisions, but some other echinoderms can have fewer or many more symetries. Characteristic of many echinoderms are their tube feet. They come in their hundreds, and each moves indepentantly, carrying the echinoderm along. In starfish, these tube feet are present on the underside beneath the arms. In urchins, they are below the rounded body, pretty much the only place with an absence of spines. In sea cucumbers, they are on the underside of the body. Brittlestars and basket stars do not have tube feet. Instead they use their arms for locomotion. They are also the only echinoderms capable of free swimming. Crinoids are have no tube feet, and most are either carried by currenty or are attached to the rock. These have been known ot move, however.
Echinoderms are one of the few phyla which have no representatives living on land or in fresh water. They rely on the seawater for everything, even using it as their blood.
Sea stars have their own class within the echinoderms: Asteroidea.
Here is the classification of the most well known of starfish, the common sea star.
Kingdom:
Animalia (All animals)Phylum:Echinodermata (Echinoderms)Class:Asteroidea (All starfish)Order:ForcipulatidaFamily:AsteriidaeGenus:AsteriasSpecies:Asterias rubens
How has the starfish adapted to its environment?
Beacuase the cushion starfish has 1000's of little suckers underneath, they stick to the rocks and they are so strong that the waves can't pull them off the rocks, but if we come along and rip it off the rocks, that damaged the cushion starfish.
What is the kingdom of starfish?
The sea star is often percieved as a starfish, but is is not a fish at all. It is part of a group called echinoderms. This group also includes sea cucumbers and sea urchins. They all have tube feet, they're invertabraes, they have a skeleton under their skin and they have no head.
Starfish, not truly a fish despite its name, does not, in fact, have two stomachs. From astounding new discoveries, we have found that this is not true; they have three. If you take a look at the Internet, it says that starfish have two stomachs. I am part of a team of science researchers trying to help make the Internet as fact-based as possible, when needed. Thank you for your time; on behalf of the team, I hope this helped.
-ScienceUnited Team
Why do starfish have 2 stomachs?
They have two stomachs because the cardiac is the one who uses its stomach to extend, so it can grab their prey, and the pyloric is the one who digest the food which it passes through the stomach, to the suckers and digest it on the outside with the suckers.
They prey on mussels, clams, oysters, crustaceans, worms, echinoderms, starfish, and sea urchins. death
What does the starfish do with its stomach when its feeding on clams or oysters?
Sea stars have a unique method of eating. The animal will actually evert its stomach outside of its body and insert it into the shell of the mollusk, for example, it is prying open. The stomach will then engulf and begin to digest the prey before it is pulled back into the inside of the sea star.
Why can a starfish move equally in any direction?
because a sea star has 5 legs
A starfish has legs that are placed horizontally around its body, so it can maneuver in any direction. Some studies indicate that some starfish may favor some of their legs and move in a particular direction most of the time, but these studies are inconclusive.
The starfish doesn't creep around the ocean floor with its arms! They actually use tiny tube feet to move around. If you turn a live starfish over you will see its tiny tube feet wiggling back at you.
How do starfish help the environment?
Starfish help the environment in numerous ways. Namely, they keep the population of sea mollusks in check, and they keep their habitat free of barnacles and algae.
Starfish are not mollusks. Starfish are classified as echinoderms, which is a phylum of marine animals that are known for their symmetry as adults. Other animals in this phylum are sand dollars and sea urchins. Sea-stars, or starfish, belong to the class Asteroidea. Like mollusks, however, starfish can be found in the intertidal zone of the ocean, where mollusks are commonly found.
How long does the beaded starfish live?
Starfishes Live On For Many Years Is In Bewteen 200-300 Years Old
Sometimes. A good test for this is to tickle one gently with your finger. If he hugs you tightly, this is a good sign. However if begins to scream and the police turn up, get out of there. That starfish is too shy for you.
the starfish does not have a brain it is made up of nerve cells that control it's functions A starfish doesn't have a brain in its head like we do. Instead their entire nervous system acts like a distributed brain. So, it has a brain, just not like ours.
The eyespots on the starfish are located at the ends of the rays, the five finger-like structures. Therefore, there are five eyespots. The eyespots are not like humans' eyes- starfishes' eyespots only sense light and dark.
Why do starfish break so easily?
the can't have sex
Who ever wrote that before this is stupid. Starfish can partake in both sexual and asexual reproduction. Sorry but I don't know the answer.
Why are starfish named starfish?
Well a starfish is called a starfish because,it is shaped like a star. (answer found by 10 year old Katie Shymonowicz( Shy-mon-o-witz)
Katie is right, but I must add that a starfish is no longer called a starfish. It is now called a "sea star." Starfish was a misnomer as it wasn't a fish. But they get the name sea star because they live in the ocean and they are shaped like a star. (answer found by 11 year old Megan Varney)
What is it called when a starfish loses an arm and grows another one?
Starfish are well known for their powers of regeneration. A complete new animal can grow from a small fragment such as an arm. In some species (Linckia multifora and Echinaster luzonicus) one of the arms will virtually pull itself away, regenerates and forms a new animal. Autotomy (self amputation) usually is a protective function, losing the body part to escape a predator rather than being eaten. But here it serves as a form of asexual reproduction. In other species of sea stars (Allostichaster polyplax and Coscinasterias calamaria) the body is broken into unequal parts (= fission) then the missing limbs regenerate.
